Sander device



Nov. 22, 1949 c. BOURDUNIS SANDER DEVI CE 2 She ets-Sheet 1 Filed Dec. l,.1 947 llllllllllllllllll E:

' IN V EN TOR. C ns tan/tine C B w' mi 7 v I Nov. 22, 1949 c. c. BOURDUNIS SANDER DEVICE 2 Sheefs-Sheet 2 Filed Dec. 1, 1947 INVENTOR. ansllalnune C B d u fi Patented Nov. 22, 1949 UNITED STATES PATENT OFFICE SANDER DEVICE Constantine G. Bourdunis, Chicago, 111.

Application December 1, 1947, Serial No. 788,981

3 Claims.

This invention relates to improvements in sanders. More particularly it relates to improvements with respect to providing an improved clamping means for clamping sand paper in a sander.

My invention involves said improvements with respect to a sander having a roll of sand paper which is adapted to be unwound as needed.

My invention also includes improvements with respect to a sander of the type which employs only a single sheet of sand paper. More specifically, my invention includes a provision of a lever to clamp the sand paper tightly in the sander.

In the preferred form shown, I have provided a base plate having an upturned flange, to which the sand paper is adapted, to be clamped by means of a loop and a wedging lever.

My invention also includes improvements with respect to the provision of a shaft and means for holding and winding sand paper upon the shaft.

In the preferred form shown, I have provided a square shaft with a square sleeve, to which the sand paper is adapted to be secured. The shaft and sleeve may be wound or unwound, as desired, and then the shaft may be secured tightly in place in a simple manner by securing the same tightly in place to a bracket to prevent that shaft from further unwinding.

I have also a modified form for a sander employing a single sheet of sand paper. are provided for clamping the sand paper in place, including a bracket and screw means.

Another object of the invention has been in the provision of the foregoing in a manner which is simple to make and assemble, and relatively low in cost.

Other and further advantages of the invention will appear from the specifications and claims and from the accompanying drawing.

Figure 1 is a plan view of the preferred form of my invention.

Figure 2 is a vertical longitudinal section.

Figure 3 is a section on the line 3-3 of Figure 2.

Figure 4 is a sectional line 44 of Figure 2, showing the holding element or clamp or wedging means.

Figure 5 is a plan view of a modified form.

Figure 6 is a vertical longitudinal section of the same.

Figure 7 is a detail of the holding member of the modified form.

As shown in the form which I have selected to illustrate the principle of my invention, I have shown a sander I0 having a bracket II, a handle I2, and a sander plate I3 having end flanges I4.

The bracket holding the handle may be secured to the plate by screws or rivets or other means.

The bracket II has an upper extending end flange I5, to which is secured by any suitable Means 2 means, a bracket I6 having protruding flanges I1 and I8.

These flanges are adapted to support a sand paper holding and winding element. This holding and winding element I9 is made generally in the form shown of two parts, to-wit, a square shaped shaft 20 which has threaded apertures 2| on each end.

Also the rearwardly extending flanges I1 and I8 are bored, and the shaft 20 is adapted to be held in place frictionally by the rearwardly extending flanges II and I8 by means of knurled screws 2I.

The other part of the holding and winding element is comprised in the form shown of sheet metal, which is formed in a square shaped sleeve, to correspond to the form of the shaft, so as to fit snugly thereon in the preferred form.

This may be described as a paper securing ele ment 22. This paper securing element has a pair of ends 23 and 24 adapted to receive one end of a roll of sand paper. The ends referred to are the narrow ends of the sheet metal in which the paper securing elements are formed. These ends are shaped to meet each other.

One end 25 of the sand paper is inserted between the ends 23 and 24 and secured thereto by means of rivets 26 or other suitable means.

In positioning the parts, the shaft 20 is inserted in the paper securing element 22 and then the screws 2| are threaded into the shaft to support the holding and winding means I9 in the bracket I6.

The opposite end 21 of the roll of sand paper 28 is then inserted in a securing loop 29, which has an outer side 30, narrow sides 3| and 32 and inner side 33 adjacent to the handle.

The loop with the sand paper is dropped over the flange I4. Pivotally secured, as at 34, to the loop by rivets, or otherwise, is a wedging or clamping lever 35, as is clearly shown, especially in Figures 4, 1 and 2.

The lever 35 has flange 36 with a curved handle, and a second flange 31, havin a curved cut away shaped portion 38. When the loop and sand paper are in place with respect to the flange I4, then the lever is pressed down.

The curved cutaway portion 38 will wedge against the flange I4 and clamp the flange I4 against the paper and the outer side 30 of the loop to tightly hold the sand paper in place.

From the sand paper securing device, consisting of the loop and the lever, the sand paper is laid along the bottom of the plate I3, and then turned upwardly on the outside of the other flange I4.

At the other flange I4 there is another securing loop and lever, similar to what already has been described, at the opposite flange I4, and it is not believed necessary to describe that again.

The arrangement of the two loops and the clamping levers are clearly shown in Figure 1. The paper is then clamped also at the opposite flange and is tightly held in place alsov at said flange, thus securelyholding thesand paper in the sander.

In the modified form shown in Figures 5, 6,

and 7, I have shown a handle 39, and a bracket 40 supporting the handle, similar to that shown,

in the first form. Also attachedto the bracket, as in the first form, is a base plate; which may be slightly curved, as showrrin Figure 6'.

The first form also is shown to be slightly curved, as in Figure 2 bracket 42, having an outward flange 43, and a pair of inward flanges 44. rear extending lug 25, having an aperture 463 This, bracket isv adapted to slidably engage flange 40, andprevents the bracket from drop,- ping 011.

The sand paper 41 is adapted tohave one. end: 48 turned .under the-bottom of flange (l3; There is a threaded stud 49 secured to the baseplate;

ll,,and this, stud extends through 1 anaperture 59'andja bracket 42. Aknurlednut is adapted to be secured down on the stud, and. clamp the bottom, of the flange 43, against the end 0f the;

sand paper.

Orr the opposite end of the sander there; is

provided a sandpaper clamping element, asjust described, including the bracket-42.

WhileIhave illustrated andjdescribed the pre ferred form of construction for carryingmyin ventiollinto effect, this is capable. of variation and modification; without departing from; the: spirit of theinvention. I, therefore,- donot wish to belimited to the precise detailsof: construc: tion set forth, but desire to avail myself otsuch' variation and modifications as; come withinthe:

There is provided r a The; bracket has: a:

2. In a device of the kind described, a sander having end flanges and sand paper securing means for securing sand paper against movement thereon, said, securing means. including loop members adaptedto be applied one each about said flanges with portions of such sand paper between said flanges and respective sides of said loops, and wedging means normally bearing against the other sides of said loops, and serving to clamp the sand paper between the said respective sidesof said loops and said flanges.

3. In a deviceaof the kind described, a sand paper mounting means including a handle and an elongated plate with an upturned sand paper mounting flange at each; end, a pair of rectangular loops which serve to confine such-sand paper to, said flanges, and: individual: wedge. elementsv hingedr interiorly to, said; loops and serving, to be swung, between the respective flanges and. a part of the respective loop and clamp suchsand: pap erlto said flanges,

CONSTANTINE C.v BOURDUNIS.

REFERENCES CITED The following references are-ofrecord in-the file of this patent:

UNITED STATES PATENTS Number Name 1 Date 53,133 Fitch Mar. 13, 1865- 59,983 Walker Now-20,4866

227,438 L0throp- May -11,- 1880 271,222 Coflin Jan. 30, 1883 378,522 Prevost Feb. 28, 1888- 7'l9',861 Plurnley Feb.= 3, 1908 824,981 Domagola Ju1y-3, 1906 825,674 Oberbeck July- 10, 1906- 838465 Seaborn Dec.- 11, 1906 840,982 Williams-a Jan. 8, 1907- 872-,568 Linderoth Dec.- 3; 1907' 1,145,134 Fowler July 6, 1915- 1,165,452- Rudolph Dec. 28, 1915' 1,418,975 Sandefur June-6, 1922 1,544,368 Brennan June 30, 1925 1,664,950- Sloan Apr.- 3, 1928*. 1,855,635 Kelly- Apr: 26; 1932 2,095,495 Enge Oct.- 12, 1937 2,113,701: Mayer- Apr. 12, 1938 FOREIGN PATENTS Number Country Date:

459,184 France- Oct; 29 19.13 

